Ecohome building guide – Elite Window Installation tips
The Demo House has been oriented towards the south to increase passive heat gain and reduce energy demand during operation. Choosing higher quality windows on all sides of your home will mean reduced heat loss over a poorer quality window, and with the right windows on the south side you can gain more heat in the daytime than they will lose at night.
The Demo House has triple-glazed argon-filled wood frame windows from Quebec manufacturer Elite. Windows on the north, east and west have been selected for maximum insulation, and differ from windows on the south which have been selected for maximum heat gain.
For more details, see this video :
Source : http://www.ecohome.net/guide/demo-house-window-installation